Put the Pepper stuff in the content namespace.

content/renderer/pepper/pepper_platform_audio_input_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/pepper/pepper_platform_audio_input_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "build/build_config.h"
 #include "content/common/child_process.h"
 #include "content/common/media/audio_messages.h"
 #include "content/renderer/pepper/pepper_plugin_delegate_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "media/audio/audio_manager_base.h"
 
+namespace content {
+
 PepperPlatformAudioInputImpl::PepperPlatformAudioInputImpl()
     : client_(NULL),
       stream_id_(0),
       main_message_loop_proxy_(base::MessageLoopProxy::current()),
       shutdown_called_(false) {
   filter_ = RenderThreadImpl::current()->audio_input_message_filter();
 }
 
 PepperPlatformAudioInputImpl::~PepperPlatformAudioInputImpl() {
   // Make sure we have been shut down. Warning: this may happen on the I/O
@@ skipping 240 matching lines @@
     label_.clear();
   }
 }
 
 void PepperPlatformAudioInputImpl::NotifyStreamCreationFailed() {
   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 
   if (client_)
     client_->StreamCreationFailed();
 }
+
+}  // namespace content